“And if you would try to count the favors of Allah, you would never be able to count them. Truly, Allah is Forgiving, Most Merciful”

Meaning that He pardons and forgives them. If He were to ask you to thank Him for all of His blessings, you would not be able to do so, and if He were to command you to do so, you would be incapable of it. If He punishes you, He is never unjust in His punishment, but He is Forgiving and Most Merciful, He forgives much and rewards for little. Ibn Jarir said: “It means that Allah is Forgiving when you fail to thank Him properly, if you repent and turn to Him in obedience, and strive to do that which pleases Him. He is Merciful to you and does not punish you if you turn to Him and repent.”